AQA specifically links feasibility studies to the testing of prototypes with potential consumers. Prototype testing helps designers find out whether a proposed design is practical before committing to full production.
Types of prototype
A prototype does not always need to look like the final product. Testing can range from a simple test rig used to investigate one function to a pre-production prototype that closely resembles and performs like the finished product.
What can be tested?
Function and performance: does the product actually work?
Ergonomics: is it comfortable, safe and easy for the intended user to operate?
Size and proportions: are dimensions suitable for the user and intended context?
Consumer response: do potential users understand, like and successfully use the design?
Why potential consumers matter
Testing with the intended users produces evidence rather than relying only on the designer's assumptions. Feedback can reveal problems and lead to modifications before expensive manufacture begins.
Design cycle: prototype → test with users → collect evidence/feedback → modify → retest → decide whether the design is suitable for production.
Prototype testing vs computer modelling
Computer modelling is useful for testing and changing a design digitally before manufacture and may reduce the time, material and cost involved in physical testing. Physical prototypes are particularly useful when real interaction, ergonomics, feel or physical performance needs to be assessed.
The most suitable method depends on what the designer needs to find out; complex projects may use both.
Exam application
Always state what would be tested, who would test it, what evidence would be collected and how that evidence would influence the design.
Example: Potential consumers could carry a prototype cup carrier containing filled cups. The designer could observe stability and comfort and collect feedback. If users find the handle uncomfortable or cups unstable, the dimensions or structure can be modified before production.
Prototype testing can expose performance and safety problems before production.Vacuum forming: a heated thermoplastic sheet is drawn over a former and held while it cools.Injection moulding: granules are melted and driven by a screw through a nozzle into a closed mould.Extrusion forces softened material through a shaped die to produce a continuous cross-section.Blow moulding: air expands a hot polymer parison against the inside of a mould.Rotational moulding coats the inside of a heated rotating mould before the hollow product cools.Compression moulding uses heat and pressure to form a measured charge inside a mould.A pattern forms a cavity in sand before molten metal is poured, cooled and removed.Die casting injects molten metal into a reusable metal die under pressure.Investment casting forms a ceramic mould around a sacrificial pattern for detailed components.MIG welding feeds a consumable wire electrode into a gas-shielded weld pool.TIG welding uses a non-consumable tungsten electrode and separate filler where required.Spot welding clamps sheet between electrodes and creates localised heat through electrical resistance.Steam softens lignin so timber can be bent around a former and held until dry.Thin veneers are glued and clamped around a former to create strong curved components.Flexography uses a relief plate and rollers to transfer ink to the substrate.Offset lithography transfers the image from plate to blanket cylinder and then to the substrate.Screen printing pushes ink through open areas of a mesh stencil onto the substrate.A focused laser follows a programmed path while assist gas helps clear the cut.Milling removes material with a rotating multi-point cutter while the work is accurately positioned.In turning, the workpiece rotates while a cutting tool removes material to create cylindrical forms.FEA divides a model into elements so stresses and deformation can be calculated.CFD predicts how fluids move around or through a product.A go/no-go gauge quickly checks whether a feature lies within its permitted tolerance.Vernier callipers measure external, internal and depth dimensions accurately.A micrometer uses a precision screw to measure small dimensions accurately.A tensile test records how a standard specimen responds as an increasing axial load is applied.Hardness tests compare resistance to permanent indentation under controlled conditions.Anthropometric data provides measured human dimensions for designing appropriate product sizes and clearances.Ergonomics applies knowledge of people to improve comfort, safety, usability and performance.Bauhaus design favoured functional forms, modern materials and design suited to industrial production.Art Deco is recognisable through geometric decoration, symmetry, luxury materials and machine-age influence.Memphis challenged restrained modernism with bold colour, pattern, geometry and playful forms.Arts and Crafts valued skilled making, natural inspiration, material honesty and resistance to poor-quality mass production.The life-cycle model helps explain how sales, competition and redesign priorities change over time.Sustainable design decisions should reduce resource use and keep products and materials useful for longer.
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